一、试题呈现例1(2014年湖北省武汉市中考试题)一次越野赛中,当小明跑了1600米时,小刚跑了1400米,小明、小刚此后所跑的路程y/(米)与时间t(秒)之间的函数关系如图1所示,则这次越野跑的全程为_米.此题是把行程问题以图像化信息的方式构建的典型问题,不仅要将图像与函数解析式对应起来,还要将图像与实际问题对应起来.本题呈现小明、小刚所跑的各自路程与时间的关系图,图中的时间节点100秒、200秒、300秒尤为重要,但这些点的纵坐标是未知量,同 First, the exam presented Example 1 (Wuhan, Hubei Province in the 2014 exam) a cross-country race, when Xiaoming ran 1600 meters, Xiaogang ran 1400 meters, Xiaoming, Xiaogang then run the distance y / (m) And the time t (seconds) as shown in Figure 1, the whole cross-country run for the _m.This question is the typical problem of travel information to build the image of the problem, not only the image and Corresponding to the function analytic, but also the image corresponding to the actual problem.This question presents Xiaoming, Xiaogang run their own distance and time chart, the time node of the picture 100 seconds, 200 seconds, 300 seconds is particularly important, but The ordinate of these points is unknowns, the same